Actually, privacy is only this big a thing in germany in the last 20-something years. The "basic law of informational self-determination" was derived from the constitutional principle that the human dignity shall be inviolabile at a similar court case in 1987 - concerning a census. See also wikipedia:Informational_self-determination

While nazis are always interesting to bring up, and there were quite a few old-nazis in germany after the war, I do not think that privacy advocates have much to thank them.